glark



0. W. CLARK. ELEVATOR BUCKET.

No. 80,602. 'Patented Aug. 4, 186B.

%a//% m kaw 'To ALL WHOM IT MAY ooncnnm gam n gtatns germ ffitr.

O. W. CLARK, OF APPLETON, WISCONSIN.

Letter; Patent No. 80,602, dated August 4, 1 868.

IMPROVEMENT IN BLEVATOR-BUGKETS.

the fitlgshulr rrfemh 1n iuflgtst itttters- 33mm amt mating and of tinstun.

Be it known that I, O. W. CLARK, of Appleton, in the county ofOutagamie, and State of Wisconsimhave .invented a new and usefulImprovement in Eleyatr-Bucket s; and do hereby declare that thefollowing is. a

full,clear, aud-exuctdescription thereof, whichwill enable those skilledin the art to make and use the same, reference being bad to, theaccompanying drawings, forming part of this specification.

The nature of my intention relates to improvements in elevator-buckets,the object of which is to make them more durable, less liable'to catchin the cases, and to make them of greater capacity.

The elevator-buckets, as at present constructed, are square at the top,presenting acute angles at the front corners, the sides being at rightangles to the buck.

The elevator-cases in which they run are generally made square, andare-of considerable length, necessitilting the joining of the ends ofthe boards of which they are made.

It not unfrequehtly happens that these joints become loose and somewhatdetached, the lower end of the upper board projecting-inward from theside of the case further than the upper end' of the lower board; andwhile the cases are constructed with considerable greater breadth thanthe buckets, to allow sufiicicnt freedom for the buckets, it notunfrequently happens that the belts become slightly twisted, whereby thebuckets will swing around so as'to catch under at their outer cornersthese projections, the result of which is very disastrous to them, andit is found that when they do so they always bend or break at theangles. I

It also sometimes happens that the belts run untruly on their pulleys,audio-re thereby drawn to one side, whereby the same result occurs.

It sometimes also happensthat sticks or stones or other foreign matterget into-the grain,and get cramped between the buckets and thecases.

llowcver any undue strain may occur to the buckets, it is almost alwaysfound that they fail at the said i acute angles in strength.

They are also unduly curved from the front upper edge to the back lowercorners, naturally lessening their capacity.

I have found that they do not require to be curved to a lesscircumference than that described by the front face of the buckets ingoing over-the pulleys, but instead of giving them a curved front face,I prefer, for economy of construction, to give them an inclinationcorresponding to such curvature, and providing a flat bottom, wherebytheir capacity is greatly increased.

I also construct them with rounded front corners, and narrower on thefront face than on the back.

On reference to the accompanying drawings Figure 1 represents a sideelevation of my improved bucket,

Figure 2 a perspective view, and

Figure 3 a side elevation of a bucket as commonly constructed.

Similar letters of reference indicate corresponding parts. I

In consequence ct being made narrower in front, as is shown in fig. 2,my improved bucket is not so liable to the before-mentionedcatching-action on the sides of the case's and, by reason of the roundedcorners, will not catch inth'e corners of the cases, and is verymaterially stronger, and the expense of two joints is also saved, andthe capacity is increased by reason of the configuration of the frontface and bottom.

I claim as new, and desire tosccure by Letters Patent Theelevator-bucket, constructed inthe form herein shown and described, asand for the purpose set forth.

-O. W. CLARK.

Witnesses:

S. P. Twmo, H. W. Goose.

